Upstairs are cramped, windowless bedrooms with eight beds (or seven, depending on the airline). This is the cabin’s rest area on the Boeing 787 Dreamliner.

The crew certainly seems to enjoy the overhead rest areas on Boeing 777s, which, depending on the airline, can fit six to 10 bunks, as well as personal storage space for each crew member.

Boeing

On the Boeing 777, pilots have their own overhead sleeping compartments, which feature two roomy sleeping berths, as well as two business-class seats, and enough room for a closet, sink, or lavatory, depending on the airline.

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Boeing

The beds, which are generally around six feet long and two and a half feet wide, are partitioned by heavy curtains meant to muffle noise.

Martin Deutsch / Flickr, CC

But asides from stifling sounds, curtains seem to be there for more than just privacy. The strict “one per bunk” warning advises against any funny business.

Chris McGinnis / TravelSkills.com

Bunks generally have reading lights, hooks, and mirrors, as well as some personal storage space. Usually they come with blankets and pillows, occasionally even pajamas.

Flickr/Sudarshan P

Though some — and this varies by airline — are a little more high end, and feature entertainment systems. Some airplanes, like this Air Canada’s Boeing 787 Dreamliner, have flat, open sleeping areas.

Reuters/Aaron Harris

Others have bunk beds that are stacked on top of each other, like this Malaysian Air A380 plane.

Courtesy of David Parker Brown, AirlineReporter.com

While most beds seem claustrophobic, this cabin on Singapore’s Airbus A380 looks comfortable.

Courtesy of David Parker Brown, AirlineReporter.com

Other planes, like this American Airlines Boeing 773, have partitioned-off beds along an aisle. The aisle is so low that you have to duck to walk through it.

Courtesy of David Parker Brown/AirlineReporter.com

There’s no room to stand up.

Courtesy of Boeing

To get back out to the main cabin, an emergency exit under one of the beds leads straight into the cabin, through an overhead bin that’s locked from the outside.